Skiving machine



Oct. 8, 1940. F`. L.. BRANDT sKIvING M'AGHINE Filed May 13, 1939 2 Sheets-Sheet l A v l lll/111111111111110 1 I 1 @www v l F x /A/ Vm TUR l fwn-4 16 www Oct. 8, 1940. F. 1 BRANDT sKIvING MACHINE Filed May 13, 1939 2 Sheets-Sheet 2 Patented Oct. 8, i940 v sKrviNo MACHINE v V Francis L; Brandt, Marblehead, Mass., assigner to v1*United Shoe Machinery Corporation,-Borough 1 of i, Flemington, N. J., acorporation of New` Jersey )entraran Mari, 1939 Sefia1N0273A75 u e i 12 Claims.- (Cl.` 12e-17) This:inventionrelatesto skiving machines and ishereinillustrated `,as embodied 'in a machine for removing the forepartv ofthe sole of a worn shoe, preparatory torep'airing the` shoe by attach- `ing a new forepart.

e Arcommonlprocedure inrepairing a` worn shoe, the solelwoi,,which'is`attached by -cement,is to puller teaihed'orepart ofthe sole from the shoe and thenV to sever the sole backoi Vthe ball line by a bevel lcut preparatory to attaching a newtorepart, the rear margin of whichhas been beveled to match the bevel onthev sole.'With this procedure, however, it is difficult, particularly when thev cement is lone having exceptionally strong bondingpower, to Iremove the forepart of Vthe worn sole-:,in such manner as `to provide on the expo-sed bottom'of the shoe a smooth suriaceto which a new iorepart may be rmly and evenly cemented. i i.

, The general object of the present invention is to provide a machine'by which this operation may readily be performed.` rTo this end, there is provided, in accordance with .one feature of the inv-ention, a` knife, a presser, a shoeholder adapted to enterthe shoeand tosupport the forepart of the sole, and means for causing theknifeto enter the sole( and `to remove a skiving from the entirewidth thereof. In the illustrated machine, the shoe holder` is rocked to present the shoe toe foremost to a stationary `knife and a cooperating presser roll,` ltwo niemberswbeing provided which extend beneath the projecting margin of the.y sole at oppcsitesides of theshoe and support the margin asthe sole is progressively presented to yand moved `past `the knife and the presser roll.

'Lhese and other features of the invention, in,- cluding certain details of construction and combinationof parts, will be described as embodied in `an illustratedi`-niachine and pointed out in the appended claims. 3

Referring to. the Laccompanying drawings, Fig. lis a front elevationv ofia machinein which the present invention is embodied;`

Eig. 2 is aside elevation of the machine; andy Fig.` 3 is Kasection,on van enlarged scale showing a shoe in-processor having the forepart of its sole removed. i

The machinecompigises a frameincluding two uprightpostsl anda crossbars Mounted for vertical sliding movement in vertical` slots in the` uppepmldsof theposts are journal boxes` Il for the shaft i3 of a presser roll, thepwork-engaging portion or said roll"'consistingl of a thick layer of yieldingmaterial Ul5, (lig.1.13), suchfas rubber, whicheenircles and; isl fast tdametal; core I1.

The journal boxes` Il are urged downward at all times by two compression springs, one of which ris shown at i9, said springs extending up into sockets formed in the crossbar which is fastened at each end to the tops of the posts by screws 2i.` In theV drawings, the presser'roll occupies its lowest position in which further downward movement of the journalboxes Il is prevented by Contact of, the lower faces of said boxes with shoulders formed at the junction of the lower ends of the verticalr slots inv which' the journal boxes il are slidable with. the upper'ends of narrower vertical slotsin which certain blocks, later to be described, are slidable.` The knife 2i is fastened to a bracket on the posts by screws, one of which is indicated at 23.

In order to present a shoe to the roll and knife in such manner that practically allj of the forepart of the sole of theshoe shall be removed, there is provided a shoe` holder which is adapted to enter a vshoe |00 and" to engage substantiallyv all of the forepart of the insole when this holder is rocked to present the forepart of its sole Zilli' progressively to the knife androll. The shoe holder comprises a'carrier 29 of the shapeshown, a curved plate `3I detachably fastened by screws 33to a curved face formed on the, carrier 29, and i a curved handle 35 terminating in a ball 31,'1which can be readily grasped by the operator tol rock the shoe carrier about a horizontal axis, the location of which will presently be described.` `A

` seriesof plates like thev plate 3l,A but of diiierentv sizes, isprovded,` any one of which can be substituted for the plate 3| so as to support the greaterl part `ofi the foreparts of soles of .different sizes. `35 The lower screw remains at all times in place in the holder 29, said screw passing through a slot, the lower end of which is large enough'to permit the head of the screw to pass throughfit. The upper end of the slot is oi 'full width for a depth 40 sufficient to receive the head of the screw, the rest of the upper end of the slot being just large enough to receive the stem of the screw. This construction permits removal and replacement of plates without removing the lower screw.`

, In order to support the projecting margin oi the sole as the sole is presented progressively to the knife and roll, two members 39 are provided, said members being located` beneath th'epresser roll andA having beveled endsadapted to be re-` ceived in the crease. between the upper 3D0 and r thev sole. Since these supports for the projecting margin of the sole` are both mounted in the same manner, only the mounting of one of them will be describedin detail. `'l'he right-hand member 55,

39 (Fig. l) is formed at the outer end of a cylindrical stem 40, which is horizontally slidable in a bore in a block 42, vertically slidable in a vertical slot in the post said stem having-at its outer end a cylindrical head 44 which is horizontally slidable in a larger alined bore formed in an extension of'said block. A compression spring 4l held against the head 44 by a cap 49, which is threaded over the outer end of the extension, urges the supporting member 39 toward the left, and a screw 5| carried by the head and extending through a long slot 53 in the exten- Sion of the block prevents the supporting member from turning. The left-hand member 39 is mounted in the same manner, the vertically slidable block in which its stem is horizontally slidable, the small screw for preventing the stem fromturning and the cap which holds a spring against the head at the outer end of the stem having been given the same numerals, increased lby 100, as those of the corresponding parts of the right-hand support 39. The two supports 39 are thus urged at all times toward each other, but will be moved apart when a shoe is forced between them and will be held beneath the projecting margin of the sole at opposite sides of the shoe during the operation of thev knife.

The shoe carrier is rocked about a horizontal axis, which is llocated at some distance beneath the presser roll and the position of which can be I varied. In the position shown in the drawings, this axis is indicated at X. It is the longitudinal axis of a long eccentric 55 formed on the middle portion of a horizontal shaft 5'|, the left-hand end of which (Fig. 1) extends through a bore in the left-hand post l and the right-hand end of which extends through a bushing 59 carried by the right-hand post. The shoe carrier 29 has a long hub, which is rotatably mounted on the eccentric 55 and extends crosswise of the machine from one post to the other. The shaft 51, which carries the eccentric 55, has pinned to one end a hub 6| provided with an upwardly extending handle 63 and a downwardly extending segment 65 having a segmental slot 67 through which extends a locking screw 69, said screw being threaded into one of the posts With this construction the shaft 51 may be rotated into and locked in different angular positions to vary the location of the horizontal axis X about which the shoe carrier is rocked, the purpose of thus varying the height or level of the axis X being to vary the depth of cut of the knife.`

The blocks 42, |42 in which are mounted the members 39 for4 supporting the projecting margin of the sole are vertically slidable, said blocks having reduced middle portions which have a sliding iit in vertical slots formed in the posts In the position of parts shown, these two blocks occupy their lowest positions. When, however, the shoe carrier 29 is rocked to present the sole of a shoe to the knife and presser roll, these blocks are pushed up and in their upward movement encounter and push up the bearing blocks of the presser roll against the force of the compression springs |9. In order to cause the blocks 42, |42 to be moved up, the shoe carrier 29 is provided with two cams |29 which contact respectively with the underl sides of projections formed respectively upon the lower portions of the blocks 42, |42. These cams, it will be noted, have curved faces, the centers of curvature of which lie in theaxis X about which the shoe holder is rocked. l

Assuming that the axis X has been located at the proper level to locate the cut where it is desired to be made in the sole of a shoe which the operator has placed upon the shoe carrier as indicated in Fig. 2, the operator grasps the ball 31 and rocks the shoe carrier clockwise to present the shoe toe-foremost between the sole margin supports and to lift the blocks 42, |42 and with them the bearings of the presser roll. As the rocking continues, the knife makes its cut. Referring to Fig. 3, in which the dash line A indicates the cut of the knife, it will be seen that the sole, which in the illustrated shoe has been considerably worn in the middle portion, is pressed by the yielding roll rmly against the shoe carrier and the sole margin supports 39, so that practically all of the forepart of the sole is removed by a cut which extends the full width of the sole, the knife emerging from the sole Well back of the ball line due to the longitudinal curvature of the sole, that is to the curve or break of the sole to the rear of the ball line. The length of the forepart of the sole, that is the distance from the break to the toe end of the sole, is greater than the length of the supporting face of the curved plate 3| so that, at the end of the cut, a portion of the sole to the rear of the ball line is curved down below the surface of the curved plate and, as stated above, the knife emerges from the sole.

Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described having in combination a xed knife, a yieldingly mounted presser, a shoe holder adapted to enter the forepart of a shoe and to support the forepart of the sole, and means for producing relative movement between the holder and the knife and presser lengthwise of the shoe to present the forepartof the sole toe foremost progressively to the knife and presser.

2. A machine of the class described having in combination a knife, a presser of resilient material, a shoe holder adapted to enter the forepart of a shoe and to support the forepart of the sole, and means for producing relative movement between the holder and the knife and presser to present the forepart of the sole progressively to the knife and presser.

3. A machine of the class described having in combination a knife, a yieldingly mounted presser roll of resilient material, a shoe holder adapted to enter the forepart of a'shoe and to support the forepart of the sole, and means for producing relative movement between the holder and the knife and presser to present the forepart of the sole progressively to the knife and presser.

4. A machine of the class described having in combination a fixed knife, a presser, and a shoe holder adapted to enter a shoe and to support the forepart of the sole, said shoe holder being rotatable to present the forepart of the sole toe foremost progressively to the knife and presser.

5. A machine of the class described having in combination a knife, a presser, a shoe holder adapted to enter a shoe and to support the forepart of the sole, said shoe holder being rotatable to present the forepart of the sole progressively to the knife and presser, and /means for varying the location of the axis of rotation of the knife. l

6. A machine for removing the forepart of the sole of a shoe preparatory to repairing the sole having in combination a fixed knife, a presser roll of resilient material, springs for permitting the roll to yield, a shoe holder rotatable about an axis located beneath said knife `and roll and adapted to enter a shoe, said holder comprising a curved supporting surface of an outline similar to that of the forepart of the insole of the shoe, and means for rotating said shoe holder about said axis.

'7. A machine for removing the forepart of the sole of a shoe preparatory to repairing the sole having in combination a fixed knife, a presser roll of resilient material, springs for permitting the roll to yield, a` shoe holder rotatable about an axis located beneath said knife and roll and adapted to enter a shoe, said holder comprising a curved supporting surface of an outline similar to that of the forepart of the insole of the shoe, and two members for supporting the projecting margin f the sole, said'members engaging the sides of the shoe and being mounted for yielding movement away from each other transversely of the shoe.

8. A machine for removing the forepart of the sole of a shoe preparatory to repairing the sole having in combination a knife, a presser, a shoe holder adapted to enter the forepart of a shoe,

means for producing relative movement between the shoe holder and the knife and presser to cause the knife to enter the sole and to remove a skiving therefrom, means for supporting the projecting margin of the sole, and means responsive to said relative movement for causing the margin-supporting means to force the margins of the sole against the presser.

9. A machine for removing the forepart of the sole of a shoe preparatory to repairing the sole having in combination a knife, a yieldingly mounted presser roll of resilientmaterial located above the knife, two members for supporting the projecting margin of the sole of `a shoe, said members being located below the knife, a shoe holder adapted to enter the forepart of the shoe,

means for moving the shoe holder to present the sole of the shoe progressively to the knifeand roll, and means movable with theV shoe holder for moving the margin-supporting members to- Ward the knife and the roll away from the knife.

10. A machine for removing the greater part of the Worn forepart of the sole of a shoe preparatory to repairing the sole having in combi-` nation a fixed knife, `a presser roll of resilient material, springs for permitting theroll to yield, a shoe holder `rotatable about an "axis located below said knife and `roll and adapted toyenter a shoe, two members for supporting the projecting margin of the sole, said members engaging opposite sides 'of the shoe and being mounted for yielding movement away from each other,

means for rotating said shoe holder, and means operated by said rotation for raising the margin-supporting members and through them the presser r'oll against its springs.

11. A machine for splitting off the greater part of the forepart of the sole of a shoe preparatory to repairing the sole having in combination aknife, a presser, a shoe holder adapted to enter a shoe and to support the forepart of the sole, leaving the rear part unsupported, and means for producing relative movement between the shoe holder and the knife to cause the knife to enter the edge at the toe end of the sole, to

split the forepart of the sole and to emerge to the rear of the ball line.

12. A machine for removing the forepart of the sole of a shoe preparatory to repairing the sole having in combination a knife, a presser roll of resilient material, springs for permitting the roll to yield, a shoe holder rotatable about an axis` located beneath the knife and roll and adapted to enter the shoe, said holder comprising a curved shoe-engaging surface, means for rotating the holder about the axis, and means operated by such rotation to raise the presser 'roll against the force of the springs.

FRANCIS L. BRANDT; 

